Auto merge of #85296 - bjorn3:plugin_cleanup, r=petrochenkov

Plugin interface cleanup

The first commit performs two uncontroversial cleanups. The second commit removes `#[plugin_registrar]` and instead requires you to export a `__rustc_plugin_registrar` function, this will require a change to servo's script_plugins (cc `@jdm)`

1 files changed, 0 insertions, 6 deletions

diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index d5c759623e3..0b1a99922d6 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -792,12 +792,6 @@ impl Session {
             )
     }
 
-    /// Returns the symbol name for the registrar function,
-    /// given the crate `Svh` and the function `DefIndex`.
-    pub fn generate_plugin_registrar_symbol(&self, stable_crate_id: StableCrateId) -> String {
-        format!("__rustc_plugin_registrar_{:08x}__", stable_crate_id.to_u64())
-    }
-
     pub fn generate_proc_macro_decls_symbol(&self, stable_crate_id: StableCrateId) -> String {
         format!("__rustc_proc_macro_decls_{:08x}__", stable_crate_id.to_u64())
     }